Question : Directions: The second number in the given number pairs is obtained by performing certain mathematical operations(s) on the first number. The same operation(s) are followed in all the pairs except one. Find that odd number pair.
Option 1: 5 : 45
Option 2: 2 : 10
Option 3: 3 : 21
Option 4: 4 : 32
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Correct Answer: 2 : 10
Solution :
Let's check the options –
First option:
5 : 45; 5 + 2 = 7 and 7
2
– 2
2
= 49 – 4 = 45
Second option:
2 : 10; 2 + 2 = 4 and 4
2
– 2
2
= 16 – 4 = 12 ≠ 10
Third option:
3 : 21; 3 + 2 = 5 and 5
2
– 2
2
= 25 – 4 = 21
Fourth option:
4 : 32; 4 + 2 = 6 and 6
2
– 2
2
= 36 – 4 = 32
So, only the second option does not follow the pattern of the other three options. Hence, the
second option
is correct.
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